From b4d1b55cc2efceeb8c68857735395119ac7a4dd2 Mon Sep 17 00:00:00 2001
From: thinkerou <thinkerou@gmail.com>
Date: Tue, 24 Oct 2017 21:38:42 +0800
Subject: [PATCH] fix bug for nil interface

---
 binding/form_mapping.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/binding/form_mapping.go b/binding/form_mapping.go
index e824d39c..3ced55be 100644
--- a/binding/form_mapping.go
+++ b/binding/form_mapping.go
@@ -50,7 +50,7 @@ func mapForm(ptr interface{}, form map[string][]string) error {
 		inputValue, exists := form[inputFieldName]
 
 		if !exists {
-			if defaultValue.(string) == "" {
+			if defaultValue == nil {
 				continue
 			}
 			inputValue = make([]string, 1)